@Linkat,
The idea that if you could save one life it is worth it cover many sins sometimes sadly it is not indeed worth it to place some program into place with the idea it might save or might not save one life. The problem with rules for dog ownership is how are you going to enforce such rules to start with and is the efforts really worth the benefits?
An interesting footnote on the one life argument/logic is the effort to stop the removing of the 55 mph nation wide limit after the first oil crisis had pass was that if we did so we would end up increasing the death rate in car accidents by thousands a year. The people as a whole was more then willing to assume that risk it would seem.
In any case in my location there is an outright ban on Pitt Bulls ownership with some high fines however that had not seem to my own personal knowledge to stop anyone I know from having them and as I feel such a ban is both an outrageous and stupid law I myself would have no problem in owning a Pit Bulls if the occurrence to do so would come up. I would pick a vet that feel the same way and list the dog as a plain boxer.
Yes sadly as long as we have large breeds of dogs around us including Pitt Bulls some number of humans including children will be kill every year and a larger number will be harm every year.
Now the question come down to is the joy and benefits of having dogs in our lives as a society worth the price of those deaths and my answer is hell yes.
To me the benefits of having the companionship of dogs is far greater then the benefits of having back yards pools and the cost in term of lost lives for having dogs is also far less by a factor of ten or so.
The whole risk/benefits equation when it come to Pitt Bulls had been driven way out of any sane reason.
Oh I would support laws that try to stop having dogs chain outside and all dogs that are fixed are far less of a danger by the studies I had seen so fixing dogs should be promoted more and other steps could be done of that nature but we are still going to have deaths of humans every year because of dogs attacks.
Sadly as long as we allow pools we will have deaths from drowning of children no matter how safe we try to make them and as long as we have large dogs of any breed there will be children kill by them.